Merge branch 'split_mainloop_onion'

src/app/config/config.c

src/app/config/statefile.c

src/app/main/main.c

src/app/main/main.h

src/app/main/ntmain.c

src/core/crypto/onion_crypto.c

src/core/crypto/onion_crypto.h

src/core/include.am

src/core/mainloop/connection.c

src/core/mainloop/cpuworker.c

src/core/mainloop/mainloop.c

src/core/mainloop/mainloop.h

src/core/mainloop/periodic.c

src/core/or/channel.c

src/core/or/channelpadding.c

src/core/or/circuitbuild.c

src/core/or/circuitlist.c

src/core/or/circuitstats.c

src/core/or/command.c

src/core/or/connection_edge.c